APA (7th ed.) Zitazioa
Craig James R. (1986). Methods of Psychological research (2nd ed.). Cole Publ. Co..
Chicago Style (17th ed.) Zitazioa
Craig James R. Methods of Psychological Research. 2nd ed. California: Cole Publ. Co., 1986.
MLA (9th ed.) Zitazioa
Craig James R. Methods of Psychological Research. 2nd ed. Cole Publ. Co., 1986.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.